Specifications include, but are not limited to: General Description This specification describes a rubber tired, 4x4x4 drive maintenance and material handling type full hydraulic, selfpropelled mobile hydraulic crane with a minimum 20 ton (40,000 lb.) capacity on-outriggers 360 and 10 ton (20,000 lb.) pick-and-carry capacity. Unit shall be equipped with front drive/steer axle and full hydraulic rear steer axle (all wheel -steer) with a full hydraulic boom and superstructure capable of 360° continuous rotation. All capacities herein are to be in US measurement. Dimensions & Weights The machine shall not exceed: • 8ft 6inches overall height • 7ft 10inches overall width • 23ft 3inches overall length The machine shall have a minimum base vehicle weight of 36,500 lbs. Boom • The boom shall be of steel construction and of the full power telescopic type having four (4) sections consisting of a base section and three (3) hydraulic powered telescopic sections. • The standard extended main boom length shall not be less than 54ft. • The boom extension system shall be of a positive mechanical/hydraulic type to ensure equal extension of the telescopic sections at any boom length. • All telescopic sections shall be adequately supported on friction type wear pads to prevent metal- to-metal contact between the sliding sections and easily adjustable side pads to facilitate lateral boom alignment. • Telescoping of the boom shall be accomplished by a single hand operated lever. • The boom head shall be a low profile “QUICK REEVE” design utilizing a 0, +40, +80 pivoting boom head system minimizing the required boom headroom to operate and be equipped with nickel plated sheaves. Swing System • The swing system shall consist of a planetary drive rotation and a single row ball bearing slew ring to provide smooth and precise control throughout 360° continuous rotation. • Both the top and bottom mounting surfaces for the slew ring shall be precision machined to ensure a uniform and level mounting surface to minimize distortion and/or binding of the slew ring under load. • The swing brake mechanism shall be of an automatic spring-applied, hydraulically-released type with an internal multi-disc wet brake arrangement. • The swing brake shall automatically apply in the event of hydraulic system or engine failure or when the swing control is returned to the neutral position. • The design of the rotating superstructure shall be such to minimize tail swing of the unit. This is to permit operation in congested areas, on rubber and outriggers.
